This is a note to let you know that I've just added the patch titled
9p: virtio: make sure 'offs' is initialized in zc_request
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
9p-virtio-make-sure-offs-is-initialized-in-zc_reques.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 940b902ece51d22fc99839e82328b85bf8588911
Author: Dominique Martinet <asmadeus@xxxxxxxxxxxxx>
Date: Wed May 3 16:49:27 2023 +0900
9p: virtio: make sure 'offs' is initialized in zc_request
[ Upstream commit 4a73edab69d3a6623f03817fe950a2d9585f80e4 ]
Similarly to the previous patch: offs can be used in handle_rerrors
without initializing on small payloads; in this case handle_rerrors will
not use it because of the size check, but it doesn't hurt to make sure
it is zero to please scan-build.
This fixes the following warning:
net/9p/trans_virtio.c:539:3: warning: 3rd function call argument is an uninitialized value [core.CallAndMessage]
handle_rerror(req, in_hdr_len, offs, in_pages);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Reviewed-by: Simon Horman <simon.horman@xxxxxxxxxxxx>
Signed-off-by: Dominique Martinet <asmadeus@xxxxxxxxxxxxx>
Signed-off-by: Eric Van Hensbergen <ericvh@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c
index f7cd8e018bde0..6b3357a77d992 100644
--- a/net/9p/trans_virtio.c
+++ b/net/9p/trans_virtio.c
@@ -409,7 +409,7 @@ p9_virtio_zc_request(struct p9_client *client, struct p9_req_t *req,
struct page **in_pages = NULL, **out_pages = NULL;
struct virtio_chan *chan = client->trans;
struct scatterlist *sgs[4];
- size_t offs;
+ size_t offs = 0;
int need_drop = 0;
int kicked = 0;
